X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FInterferenceCache.h;h=18aa5c7c5ad6257eb385182401d994ea65310be6;hb=027a9f45617c2a9ecb809e6b28aac12bdc2d08ec;hp=800f7055752697e2b9dd8df8ebd4fcc111eb2d05;hpb=4f3b5e8c9232e43d1291aab8db5f5698d7ee0ea4;p=oota-llvm.git

diff --git a/lib/CodeGen/InterferenceCache.h b/lib/CodeGen/InterferenceCache.h
index 800f7055752..18aa5c7c5ad 100644
--- a/lib/CodeGen/InterferenceCache.h
+++ b/lib/CodeGen/InterferenceCache.h
@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_CODEGEN_INTERFERENCECACHE
-#define LLVM_CODEGEN_INTERFERENCECACHE
+#ifndef LLVM_LIB_CODEGEN_INTERFERENCECACHE_H
+#define LLVM_LIB_CODEGEN_INTERFERENCECACHE_H
 
 #include "llvm/CodeGen/LiveIntervalUnion.h"
 
@@ -21,7 +21,7 @@ namespace llvm {
 
 class LiveIntervals;
 
-class InterferenceCache {
+class LLVM_LIBRARY_VISIBILITY InterferenceCache {
   const TargetRegisterInfo *TRI;
   LiveIntervalUnion *LIUArray;
   MachineFunction *MF;
@@ -77,7 +77,8 @@ class InterferenceCache {
       /// Iterator pointing into the fixed RegUnit interference.
       LiveInterval::iterator FixedI;
 
-      RegUnitInfo(LiveIntervalUnion &LIU) : VirtTag(LIU.getTag()), Fixed(0) {
+      RegUnitInfo(LiveIntervalUnion &LIU)
+          : VirtTag(LIU.getTag()), Fixed(nullptr) {
         VirtI.setMap(LIU.getMap());
       }
     };
@@ -93,7 +94,7 @@ class InterferenceCache {
     void update(unsigned MBBNum);
 
   public:
-    Entry() : PhysReg(0), Tag(0), RefCount(0), Indexes(0), LIS(0) {}
+    Entry() : PhysReg(0), Tag(0), RefCount(0), Indexes(nullptr), LIS(nullptr) {}
 
     void clear(MachineFunction *mf, SlotIndexes *indexes, LiveIntervals *lis) {
       assert(!hasRefs() && "Cannot clear cache entry with references");
@@ -135,7 +136,8 @@ class InterferenceCache {
 
   // Point to an entry for each physreg. The entry pointed to may not be up to
   // date, and it may have been reused for a different physreg.
-  SmallVector<unsigned char, 2> PhysRegEntries;
+  unsigned char* PhysRegEntries;
+  size_t PhysRegEntriesCount;
 
   // Next round-robin entry to be picked.
   unsigned RoundRobin;
@@ -147,7 +149,15 @@ class InterferenceCache {
   Entry *get(unsigned PhysReg);
 
 public:
-  InterferenceCache() : TRI(0), LIUArray(0), MF(0), RoundRobin(0) {}
+  InterferenceCache()
+    : TRI(nullptr), LIUArray(nullptr), MF(nullptr), PhysRegEntries(nullptr),
+      PhysRegEntriesCount(0), RoundRobin(0) {}
+
+  ~InterferenceCache() {
+    free(PhysRegEntries);
+  }
+
+  void reinitPhysRegEntries();
 
   /// init - Prepare cache for a new function.
   void init(MachineFunction*, LiveIntervalUnion*, SlotIndexes*, LiveIntervals*,
@@ -160,11 +170,11 @@ public:
   /// Cursor - The primary query interface for the block interference cache.
   class Cursor {
     Entry *CacheEntry;
-    BlockInterference *Current;
-    static BlockInterference NoInterference;
+    const BlockInterference *Current;
+    static const BlockInterference NoInterference;
 
     void setEntry(Entry *E) {
-      Current = 0;
+      Current = nullptr;
       // Update reference counts. Nothing happens when RefCount reaches 0, so
       // we don't have to check for E == CacheEntry etc.
       if (CacheEntry)
@@ -176,10 +186,10 @@ public:
 
   public:
     /// Cursor - Create a dangling cursor.
-    Cursor() : CacheEntry(0), Current(0) {}
-    ~Cursor() { setEntry(0); }
+    Cursor() : CacheEntry(nullptr), Current(nullptr) {}
+    ~Cursor() { setEntry(nullptr); }
 
-    Cursor(const Cursor &O) : CacheEntry(0), Current(0) {
+    Cursor(const Cursor &O) : CacheEntry(nullptr), Current(nullptr) {
       setEntry(O.CacheEntry);
     }
 
@@ -192,7 +202,7 @@ public:
     void setPhysReg(InterferenceCache &Cache, unsigned PhysReg) {
       // Release reference before getting a new one. That guarantees we can
       // actually have CacheEntries live cursors.
-      setEntry(0);
+      setEntry(nullptr);
       if (PhysReg)
         setEntry(Cache.get(PhysReg));
     }